mirror of
https://github.com/cc65/cc65.git
synced 2024-12-23 19:29:37 +00:00
36 lines
692 B
ArmAsm
36 lines
692 B
ArmAsm
;
|
|
; Ullrich von Bassewitz, 31.05.1998
|
|
;
|
|
; int strcmp (const char* s1, const char* s2);
|
|
;
|
|
|
|
.export _strcmp
|
|
.import popax
|
|
.importzp ptr1, ptr2
|
|
|
|
_strcmp:
|
|
sta ptr2 ; Save s2
|
|
stx ptr2+1
|
|
jsr popax ; Get s1
|
|
sta ptr1
|
|
stx ptr1+1
|
|
ldy #0
|
|
|
|
loop: lda (ptr1),y
|
|
cmp (ptr2),y
|
|
bne L1
|
|
tax ; end of strings?
|
|
beq L3
|
|
iny
|
|
bne loop
|
|
inc ptr1+1
|
|
inc ptr2+1
|
|
bne loop
|
|
|
|
L1: bcs L2
|
|
ldx #$FF
|
|
rts
|
|
|
|
L2: ldx #$01
|
|
L3: rts
|